Pump for viscolizer valves



Feb. 14, 1939. B D L I 2,146,709

PUMP FOR VISCOLIZER VALVES Filed July 10, 1935 5 Sheets-Sheet 1 F Z 2 7 INVENTOR.

ATTORNEYI' Feb. 14,1939. J. c. B IRD ET AL PUMP FOR VISCOLIZER VALVES Filed July 10, 1935 5 Sheets-sheaf 2 Feb. 14, 1939. J. c. BIRD ET AL PUMP FOR VISCOLIZER VALVES Filed July 10, 1935 V 3 Sheets-Sheet 3 I 3 o mh n m M m w 1 W 5 6 A U Q W .-fl/ MMM I fl/ 4 J 1/ 1007 0 ,z i 0N 0N. fl m Patented Feb. 14, 1939 UNITED STATES PATENT OFFICE,

Micln, assignors to Union Steam Pump Com pany, Battle Creek, Mich. Application July 10, 1935, Serial No. 30,643

1 Claim.

This invention relates to improvements in pumps especially adapted for the pumping of milk or food products and available especially for viscolizing.

The objects of the invention are:

First, to provide an improved viscolizer pump.

Second, to provide an improved take-apart pump in which the parts are readily accessible and each part can be removed without disassociating the others.

Third, to provide in such a pump improved arrangement and disposition of the valves.

Fourth, to provide an improved construction of stufiing box which is readily removable and in the preferred form one in which the packing material is also readily accessible for cleansing.

Fifth, to provide a very simple yet strong construction for such a pump that is readily cleaned.

Further objects and objects pertaining to details and economies will appear from the description to follow. We accomplish the objects of our invention by the pump structures illustrated in the accompanying drawings, in which:

'Fig. 1 is a detail power unit in conventional form with one of our improved viscolizer pumps in position.

Fig. 2 is an enlarged detail elevation view of the pump with its supporting pad, taken from the right hand of Fig. 1.

Fig. 3 is an enlarged detail sectional elevation on line 3--3 -f Fig. 2, the pump plunger being shown in full lines.

Fig. 4 is a detail view showing the parts in disassociated relation, the valve seats and the intake valve being shown pressed into position.

Fig. 5 is an enlarged detail plan view partially in section on lines 5-5 of Figs. 2 and 6, showing the modifiedform in which a regular construction of stuifing box, made detachable, is employed in place of our improved stuffing box.

Fig. 6 is an enlarged detail sectional elevation taken on line 6-6 of Fig. 5, showing details of the pump with a detachable cylinder head.

The parts of the drawings will be.identified by their numerals of reference which are the same in all the views. Y

I is the power unit of the pump, shown conventionally of a usual form. 2 is the pad on the base of the power unit on which our improved pump rests. 3 is the cylinder block, here provided with three cylinder bores 4 for the pump pistons. The block might be provided with a single pump cylinder or any number required, the construction being the same for one or any number. 3| are supporting bolts at the ends of block 3 and in the plane of the cylinder bores.

5 is a transverse bore for the intake to the pump and 6 is a transverse borelsee Fig. 4 and also the dotted lines in Fig. 5) for the pump 5 discharge. A vertical bore 1 is through each pump cylinder, extending across the bore 6 and into the bore 5. In this vertical bore 1 aredisposed the valve seat 8 forthe intake valve and a valve 'seat 9 for the discharge valve. 8' is 10 the intake valve and 9' is the discharge valve, seated as indicated- Thevalve 8' is provided with a button 8" by which it may be readily picked up and removed from the cylinder. (See details in Figs. 3 and 4.) p

The cylinder is provided with a detachable headlfl held in place by cap screws II. This is provided with an inwardly projecting crescent portion Hll for a stop to the intake valveli', with a cross aperture I02 for the passage of 20 the inflowing liquid. 7 This passage is for direct flow as the liquid can pass around the end of this stop.,

Each pump plunger I2 is detachably secured to a reciprocating stub l3 for actuation. The 5 plunger is cut away or flattened for the application of a wrench and is shouldered and screw threaded for attachment. This may be a piston rod or other reciprocating part. The plunger I2 is surrounded by a stufiing box having a detach- 3 able gland adapted to embrace a hat-shaped packing I5 which fits between the gland l4 and the projecting flange IE on the bodyof the stuffing box. The body of the stufifing box I I fits into a countersunk portion of the bore of the pump, provided with a sealing gasket I9, the same being retained by the cap screws ll threaded thereinto, as seen in Fig. 3. The hat-shaped packing I5 is formed with flanges at right angles to each other with square comers. 40

It is especially desirable, in order to conform with the requirements of the dairy industry, to depart quite radically from the conventional form of cylinder which has been used on all such pumps up to date. This cylinder is constructed so that 5 every portion of the cylinder is readily accessible for cleansing by mechanicalmeans, such as a brush. There are no threads with which the mix comes in contact, and by this construction the corners, which are difiicult or impossible, to cleanse and which constitute a l dging place for material that would harbor bacteria, are .elimin-v ated. The design of this cylinder in embodying these features accomplishes a facility for cleansing and sterilizing whichhas not'before been reached.

With this construction, after the gland I4 has been loosened and the stuffing box withdrawn from the cylinder, the pump piston or plunger can be taken out without disturbing the cylinder or the back head; and when removed the plunger, gland, stufling box and packing can be individually cleaned and sterilized. The specially-formed gasket or hat packing I5 can readily be removed without distortion for cleaning and sterilizing.

This feature is not present in any pump using a plurality of packing rings, because when more than one ring is present, each ring will be seated into the adjacent rings in a manner which makes it impossible to take the rings apart and reassemble them again in workable condition; whereas, in the case of this pump there can be no distortion or the rings because they are held between inflexible metallic surfaces. However, in case we wish to use a plurality of rings of the conventional pattern (see Fig. 6), the cleaning may be more eilfectually done when used in this pump, because the plunger can be withdrawn without disturbing the cylinder, and the packing rings being contained within a case readily handled, can be cleansed far more effectually than in the case of the ordinary design of pump.

The invention is applicable to regular forms of stuiiing boxes. as seen in Figs. 5 and 6. The body 20 or this stufling box is detachable from the cylinder in the usual way and a regular gland II is screw threaded upon the body and clamps regular packing rings or material 22 in place.

We desire to claim the invention specifically and broadly, as provided in the appended claim.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

In a pump, the combination of a cylinder block having a cylinder therein comprising a bore extending from opposite faces of the block, a stuffing box in one of saidopenings, a plunger slidable through said stufllng'box and having screw threads thereon for attachment to a plunger rod, a power unit for the pump having a stub plunger rod screw threaded to fit the screw threads of the plunger, whereby the plunger and stub plunger rod may be joined, means on said plunger to permit disconnection of said plunger from said stub plunger rod without disassembly of said pump,

and a removable capclosing the opening of the pump opposite said stumng box.

JOHN C. BIRD. KARL D. SMITH. 

